 namespace local = ""
 namespace inh = inherit
 namespace xlink = "http://www.w3.org/1999/xlink"
 namespace dc = "http://purl.org/dc/elements/1.1/"
 
 start = 
    [
       xlink:type = "simple"
       xlink:role = "http://www.w3.org/1999/xhtml"
       xlink:arcrole = "http://www.rddl.org/purposes#reference"
       xlink:href = "library.xhtml"
       dc:title [ "The library element" ]
       dc:author [ "Eric van der Vlist" ]
    ]
    element library { book-element+ }
 
 author-element = 
    element author
    {
       attribute id { text },
       name-element,
       born-element,
       dead-element?
    }
 
 book-start = 
    attribute id { text },
    isbn-element,
    title-element,
    author-element*
 
 book-end = author-element*, character-element*, attribute available { text }
 
 book-element = element book { book-start, book-end }
 
 born-element = element born { text }
 
 character-element = 
    element character
    {
       attribute id { text },
       name-element,
       born-element,
       qualification-element
    }
 
 dead-element = element dead { text }
 
 isbn-element = element isbn { text }
 
 name-element = element name { text }
 
 qualification-element = element qualification { text }
 
 title-element = element title { attribute xml:lang { text }, text }
